/*
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package swing.samples.oracle.tutorial.CheckBox;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

/*
 * CheckBoxDemo.java requires 16 image files in the images/geek
 * directory: 
 * geek-----.gif, geek-c---.gif, geek--g--.gif, geek---h-.gif, geek----t.gif,
 * geek-cg--.gif, ..., geek-cght.gif.
 */
public class CheckBoxDemo extends JPanel implements ItemListener {
	JCheckBox chinButton;
	JCheckBox glassesButton;
	JCheckBox hairButton;
	JCheckBox teethButton;

	/*
	 * Four accessory choices provide for 16 different combinations. The image
	 * for each combination is contained in a separate image file whose name
	 * indicates the accessories. The filenames are "geek-XXXX.gif" where XXXX
	 * can be one of the following 16 choices. The "choices" StringBuffer
	 * contains the string that indicates the current selection and is used to
	 * generate the file name of the image to display.
	 * 
	 * ---- //zero accessories
	 * 
	 * c--- //one accessory -g-- --h- ---t
	 * 
	 * cg-- //two accessories c-h- c--t -gh- -g-t --ht
	 * 
	 * -ght //three accessories c-ht cg-t cgh-
	 * 
	 * cght //all accessories
	 */

	StringBuffer choices;
	JLabel pictureLabel;

	public CheckBoxDemo() {
		super(new BorderLayout());

		// Create the check boxes.
		chinButton = new JCheckBox("Chin");
		chinButton.setMnemonic(KeyEvent.VK_C);
		chinButton.setSelected(true);

		glassesButton = new JCheckBox("Glasses");
		glassesButton.setMnemonic(KeyEvent.VK_G);
		glassesButton.setSelected(true);

		hairButton = new JCheckBox("Hair");
		hairButton.setMnemonic(KeyEvent.VK_H);
		hairButton.setSelected(true);

		teethButton = new JCheckBox("Teeth");
		teethButton.setMnemonic(KeyEvent.VK_T);
		teethButton.setSelected(true);

		// Register a listener for the check boxes.
		chinButton.addItemListener(this);
		glassesButton.addItemListener(this);
		hairButton.addItemListener(this);
		teethButton.addItemListener(this);

		// Indicates what's on the geek.
		choices = new StringBuffer("cght");

		// Set up the picture label
		pictureLabel = new JLabel();
		pictureLabel.setFont(pictureLabel.getFont().deriveFont(Font.ITALIC));
		updatePicture();

		// Put the check boxes in a column in a panel
		JPanel checkPanel = new JPanel(new GridLayout(0, 1));
		checkPanel.add(chinButton);
		checkPanel.add(glassesButton);
		checkPanel.add(hairButton);
		checkPanel.add(teethButton);

		add(checkPanel, BorderLayout.LINE_START);
		add(pictureLabel, BorderLayout.CENTER);
		setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));
	}

	/** Listens to the check boxes. */
	public void itemStateChanged(ItemEvent e) {
		int index = 0;
		char c = '-';
		Object source = e.getItemSelectable();

		if (source == chinButton) {
			index = 0;
			c = 'c';
		} else if (source == glassesButton) {
			index = 1;
			c = 'g';
		} else if (source == hairButton) {
			index = 2;
			c = 'h';
		} else if (source == teethButton) {
			index = 3;
			c = 't';
		}

		// Now that we know which button was pushed, find out
		// whether it was selected or deselected.
		if (e.getStateChange() == ItemEvent.DESELECTED) {
			c = '-';
		}

		// Apply the change to the string.
		choices.setCharAt(index, c);

		updatePicture();
	}

	protected void updatePicture() {
		// Get the icon corresponding to the image.
		ImageIcon icon = createImageIcon("images/geek/geek-"
				+ choices.toString() + ".gif");
		pictureLabel.setIcon(icon);
		pictureLabel.setToolTipText(choices.toString());
		if (icon == null) {
			pictureLabel.setText("Missing Image");
		} else {
			pictureLabel.setText(null);
		}
	}

	/** Returns an ImageIcon, or null if the path was invalid. */
	protected static ImageIcon createImageIcon(String path) {
		java.net.URL imgURL = CheckBoxDemo.class.getResource(path);
		if (imgURL != null) {
			return new ImageIcon(imgURL);
		} else {
			System.err.println("Couldn't find file: " + path);
			return null;
		}
	}

	/**
	 * Create the GUI and show it. For thread safety, this method should be
	 * invoked from the event-dispatching thread.
	 */
	private static void createAndShowGUI() {
		// Create and set up the window.
		JFrame frame = new JFrame("CheckBoxDemo");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		// Create and set up the content pane.
		JComponent newContentPane = new CheckBoxDemo();
		newContentPane.setOpaque(true); // content panes must be opaque
		frame.setContentPane(newContentPane);

		// Display the window.
		frame.pack();
		frame.setVisible(true);
	}

	public static void main(String[] args) {
		// Schedule a job for the event-dispatching thread:
		// creating and showing this application's GUI.
		javax.swing.SwingUtilities.invokeLater(new Runnable() {
			public void run() {
				createAndShowGUI();
			}
		});
	}
}
